I think if you re-watch the SS float segment and track who sings what lines, you'll find that the director fell behind somewhere, and wound up hitting all the marks a full camera shot behind. So when you heard Grover, for instance, sing his lines you were seeing someone else just dancing in shot, then for the next line of the song you'd see Grover in his window dancing while you heard someone else singing. I don't know how they got behind, but watch it again and I think you'll see that there's a pattern to their disarray, lol.

Snuffy has been outside of the studio more than just in Follow That Bird. He was out of the studio in the hawiai episodes, Don't Eat the Pictures, and Julie on Sesame Street. But I think it would be too difficult for anybody to perform Snuffy for however long the parade is without taking many breaks. The costume must be heavy, and two performers have to be inside of it, so it would probably be more painful than being inside of Big Bird, Barkley, or Alice for three straight hours.

Snuffy has been outside of the studio more than just in Follow That Bird. He was out of the studio in the hawiai episodes, Don't Eat the Pictures, and Julie on Sesame Street. But I think it would be too difficult for anybody to perform Snuffy for however long the parade is without taking many breaks. The costume must be heavy, and two performers have to be inside of it, so it would probably be more painful than being inside of Big Bird, Barkley, or Alice for three straight hours.